HexaPDF is a pure Ruby library with an accompanying application for working with PDF
In short, it allows creating new PDF files, manipulating existing PDF files, merging multiple
PDF files into one, extracting meta information, text, images and files from PDF files, securing
PDF files by encrypting them and optimizing PDF files for smaller file size or other
HexaPDF was designed with ease of use and performance in mind. It uses lazy loading and lazy
computing when possible and tries to produce small PDF files by default.